---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-25-006475"
form_type: "8-K"
ticker: "NPK"
cik: "0000080172"
company_name: "NATIONAL PRESTO INDUSTRIES INC"
filed_at: "2025-03-06T23:59:59+00:00"
generated_at: "2026-05-25T08:19:40.978075+00:00"
event_type: "cyber"
sentiment: "negative"
materiality_score: 0.9
calibrated_materiality_score: 0.9
confidence: "medium"
source: SEC EDGAR
---

# National Presto suffers system outage from cybersecurity incident on March 1

## Summary
- System outage on March 1, 2025, caused by a cybersecurity incident; forensic analysis ongoing.
- Operations temporarily impacted, including shipping, receiving, manufacturing, and back office functions.
- Incident response team activated; law enforcement and regulators notified.
- Potential for material impact on financial condition and results of operations; full scope unknown.

## SEC filing metadata
- accession: 0001437749-25-006475
- form_type: 8-K
- ticker: NPK
- cik: 0000080172
- company_name: NATIONAL PRESTO INDUSTRIES INC
- filed_at: 2025-03-06T23:59:59+00:00
- event_type: cyber
- sentiment: negative
- materiality_score: 0.9
- calibrated_materiality_score: 0.9
- confidence: medium
- sec_items: 1.05, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/80172/000143774925006475/0001437749-25-006475-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/80172/000143774925006475/npk20250306_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-25-006475
- JSON: https://secwatch.observer/filing/0001437749-25-006475.json
- Plain text: https://secwatch.observer/filing/0001437749-25-006475.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.